TOWER CRANE QTZ31.5 lifting mechanism adopts speed regulation by frequency control

TOWER CRANE QTZ31.5 lifting mechanism adopts speed regulation by frequency control System 1

TOWER CRANE QTZ31.5 lifting mechanism adopts speed regulation by frequency control System 2

TOWER CRANE QTZ31.5 lifting mechanism adopts speed regulation by frequency control

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Loading Port:: Qingdao

Payment Terms:: TT or LC

Min Order Qty:: 1 unit

Supply Capability:: 6 unit/month

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The tower crane is a hydraulic tower crane with swing top, horizontal jib and mobile trolley. It has the hoisting moment for315Kn.m;the maximum hoisting load of 3t and the maximum working radius of 39m.The hoisting height of anchoring tower crane is 25m and that of climbing tower crane is 100m.

The tower crane has ingenious design, beautiful shape and simple structure .It is easy to operate and maintain, and is safe and at a reasonable price .It is an ideal construction machines for construction enterprises. It has hoisting mechanism, swing mechanism, top-rising mechanism and radius mechanism, which can work individually or cooperatively to make a high efficiency. The top-rising mechanism is used to raise or lower tower. The hoisting mechanism has 3-speed electronic motor respectively for high, medium and slow hoisting speeds. It has flexible swing mechanism and radius mechanism and slewing mechanism for vertical and /or horizontal transportation of building materials in one time.

The tower crane has complete and sensitive protection devices such as hoisting weight limiter, hoisting moment limiter, hoisting height limiter, radius limiter and swing limiter to ensure of regular operation. It also has rest platform, guardrail and other protection devices. Driver’s cab is at a side of rib and has big space and wide visual field.

The tower crane has excellent performance and is suitable for hoisting in short civil or industrial buildings or loading or unloading in ports or goods yards

TOWER CRANE QTZ31.5 lifting mechanism adopts speed regulation by frequency control

1 Main technical Parameters

Name		Unit	Index
			QTZ31.5
Nominal hoisting moment		kN.m	315
Max. hoisting weight		t	3
Rated hoisting weight at jib nose		t	0.734
Working radius		m	2.5~39
Height	Independent	m	25
	Attached	m	100
Hoisting Speed	Ratio.		2
	Hoisting speed	m/min	42/21/7
Swing speed		r/min	0.45/0.7
Radius speed		m/min	33
Top-hoisting speed		m/min	0.7
Weight(independent)		t	19.5(21)
Ballast weight		t	5
Max. swing radii		m	39.75
rear swing radii		m	10.37
Max. working wind speed		m/s	20
Max wind speed for top rising		m/s	13
Working temperature		℃	-20~40

2 Technical Parameters of Main Parts

Name										index
hoisting structure			Electric motor	model						YZS200L₁-4/8/24
				power	kW					15/15/4
				Rotating speed	r/min					1440/730/220
			Decelerating motor	model						JZQ400
				Central distance			mm			400
				ratio						15.75
			Arrester	model						YWZ-200/25
				Braking moment					N.m	200
				Hydraulic propeller						YT₁-25
			Steel wire							6*19-12.5-1670-I-right twisted
swing mechanism		Epicyclical reducer		model						XX4-63
				Reducing ratio						195
		fluid coupling								YOX-220A
		Slewing ring								011.32.1120
		Electric motor		model						YD112M-6/4 B5
				Power				kW		2.2/2.8
				Rotating speed				r/min		950/1440
radius changing mechanism	Electric motor			model						Y100l2-4
				Power		kW				3
				Rotating speed		r/min				1430
	reducer			model						WCJ-120
				Reducing ratio						38
	Steel wire									6*19-6.2-1570-I-right twisted
Lifting mechanism	Electric motor			model						Y100L₂-4 B5
				power	kW					3
				Rotating speed	r/min					1430
	Hydraulic oil cylinder									HSGK-125/90-1320
	Rating pressure			MPa						16

Q:I saw a picture of a oragami crane ring that was made out of money on a website but it diddint have any instructions on how to make it. I can already make the regular ring, but i would really like to try to make the crane ring does anyone know of any website that has instructions on how to make it??: I okorder /

Q:Hi,what are crane swivels and fishing swivels. are they same: FishSteelhead okorder /

Q:When should a crane be load tested?: if crane using regularly more then 8 hrs test should be every 4 months 8 months and full sevice at 12 months............ Load Testing Services ACECO provides inhouse vertical load testing services for load bearing equipment. Examples of equipment that can be load tested: ? Below the hook lifting devices ? Hoists ? Hooks ? Testing can be performed to meet ASME B30.20, B30.10, and B30.16 as well as ANSI N14.6. ? Standard inhouse 50 ton load testing capacity. ? Ability to test higher load capacity devices (Up to 5,000,000 pounds). ? Have tested up to 640,000 pounds (320 tons). ? Engineering manufacturing available to provide lift fixtures for test purposes. ? Can provide nondestructive testing of critical welds and critical locations. ? Inhouse capability to make weld repairs using AWS D1.1 qualified procedures and welders. ? Calibrated test weights available. ? Testing can be performed in accordance with 10CFR50,Appendix B Quality Program. ? Certificates of Test and/or Test Reports can be provided. ? Can provide onsite load testing services, including supply of calibrated weights.

Q:What is the admissible weight of a crane?: Depends on how it is transported - you have to give more information on the kind of crane and where it will be used.

Q:Im looking for more information on Overhead Cranes!?: Advantages of Overhead Crane for Professionals When large materials have to be handled in the building, construction and mining industries, there are several types of equipment that would be used. One of such equipment is the overhead crane, and because of its size, it is conspicuously seen at construction or mining sites. Not only does it have a domineering figure but it is also a very versatile equipment for moving heavy materials from one point to the other. This equipment occurs in many forms and the various forms it has, makes it adaptable to many environments. There are other types of equipment that are available for lifting, but a crane is the preferred choice of many people. I got most of this information from www.hoistandwinch .uk There are several reasons people in the construction and mining industries would choose a crane over other equipment that are used for lifting. With overhead cranes, there would be absolutely no need to clear aisles before materials can be moved. Forklifts or fork trucks could have their paths blocked and a lot of time and energy would have to be diverted to clear an aisle. Obstructions that could even make you suspend important projects are irrelevant to overhead cranes because they would easily make it around them without any form of difficulty. It is therefore possible to arrange your plant floor the way you would want it to be for your business, without thinking about obstructions to the lifting and movements of materials with cranes to do all the task for you.

Q:Tower cranes sometimes have very long booms, but seem to usually have fixed counter-weights at fixed positions behind the cab. Why doesn't it flip backwards when there is no load, or flip forwards when a load is way at the far outward end of the boom? It seems to be a very large range of moment arms given that the counter-weight has a fixed one.: I think the counter weights are connected to a pully system that directly interacts with the boom and hook movement. This way it can put more or less pull on the weights according to the amount of weight or position of the weight on the crane.

Q:Flocks of cranes shout'. Is it right to use the word'shout' here?: No, it's not. First, the collective noun for cranes—its term of venery—is either herd or sedge, not flock. Second, the sound a crane makes is a whoop, or when not a whoop but a rattling sound, it is a bulge, not a shout.

Q:the highest ranking American serviceman, at least in the so called prison camp: no, he was brutally murdered

Q:how to make a magnetic crane on cheap price?: The whole crane or just the lifting device? Not easy to be cheap in either case - the crane because of safety concerns and the lifting head because it requires a lot of now high priced copper wire, well insulated, and a hefty electrical source with long cables to get the power to the head. Best (probably) to buy used if you want to save money.

Q:how does a crane operator's knowledge of where the centroid is generally located for most uniform objects help them perform their job more safely?: Usually it is the rigger who attaches the lifting gear not the crane operator who needs to know about centriods and even then the real trick is getting the slings or other lifting devices in the exact place. That tends to be a bit of trial and error unless the lifting points are clearly marked.

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